Reading would be so useless, it would be like preparing for anatomy by flipping through Netter's the summer before med school. If you look at the imaging of your patients in intern year and try to find what the radiology report is talking about you will be further ahead than 90% of people.
Ditto looking at the radiology reports carefully. Soon you will be on the other end of the powermic and will struggle to remember what it was like for the intern reading your report to understand all the esoteric mumbo jumbo we put in the reports and how clinically relevant or irrelevant things were.
If you can take from intern year a better understanding the knowledge base of referring clinicians from various specialties and various training levels, the clinical workflow, and the clinical decision making, you will be a better radiologist because you will communicate in a clearer and more relevant manner.
Also, remember all your interactions with radiology, so you will treat others as you wish you were to be treated.
Some things I remember from intern year
-my rheumatology attending not knowing what a "TFCC" was
-getting important findings alerts in my inbox and not understanding what was so important about them and just ignoring them
-getting a readout of a CTA runoff impression over the phone and not understanding what any of it meant
-asking the radiology resident what she meant by 'nonspecific findings that may be seen with normal pressure hydrocephalus' and what I do with that information
-being talked down to and out of a lung biopsy because the patient had severe COPD
-reading a CT abdomen impression that actually sounded like it was trying to address the question I asked
Also, picking up the colloquialisms and knowledge about cutting edge medicine in general is useful. Don't be anxious you can't see a direct connection to radiology yet. For instance, I had to explain to radiology attendings about CAR-T cells and what 'HFpEF' stood for. These small things make you look good.